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Phr33d0m
n00b
Joined: 21 Jul 2011
Posts: 21
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 Posted: Mon Jun 18, 2012 10:06 pm Post subject: Automatically undervolt cpu |
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Hello, I have this i7 cpu that has turbo boost and stuff. I've noticed that when the cpu is idle it underclocks to 1.6GHz and it rises upon needed up to my max 4.4GHz.
The problem here is that the cpu Vcore is always the same (1.29V), it doesn't undervolt when it underclocks.
I've noticed that this is the common behaviour in windows - when the cpu underclocks it also undervolts (at 1.6GHz it stays at 1.11V in windows), is there any way to trick it to do that on gentoo?
Any tips appreciated.
Thanks. |
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albright
Advocate
Joined: 16 Nov 2003
Posts: 2588
Location: Near Toronto
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| Posted: Mon Jun 18, 2012 10:38 pm Post subject: |
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you could try phc-intel but I don't know if it handles i7s
(works great on my core 2 duo ...)
_________________
.... there is nothing - absolutely nothing - half so much worth
doing as simply messing about with Linux ...
(apologies to Kenneth Graeme) |
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SlashBeast
Retired Dev
Joined: 23 May 2006
Posts: 2922
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| Posted: Mon Jun 18, 2012 10:44 pm Post subject: |
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How are you checking the voltage under linux?
the acpi-cpufreq driver suppose to undervolt cpu as well. Linux-phc allow you just to change the specified voltage on specified freq (I also use it, love it). |
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Phr33d0m
n00b
Joined: 21 Jul 2011
Posts: 21
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| Posted: Mon Jun 18, 2012 11:26 pm Post subject: |
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| SlashBeast wrote: | | How are you checking the voltage under linux? |
Well, I rely on lm_sensors.
| SlashBeast wrote: | | the acpi-cpufreq driver suppose to undervolt cpu as well |
I'm already having/using the kernel's cpufreq drivers which automatically underclock the cpu.
Any tips how could I achieve the undervolting as well?
Btw phc-intel doesn't seem to support i7 (very well) so I'd like to avoid it. |
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